Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Derby's average high-temperature marks a still refreshing 17.2°C (63°F) with the advent of September, closely mirroring that of the preceding month. Derby records an average temperature drop to a frosty 9.7°C (49.5°F) in September.Humidity
In September, the average relative humidity is 83%.Rainfall
In Derby, in September, it is raining for 11.5 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, there are 163.9 rainfall days, and 358mm (14.09") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:44 pm BST.
Sunshine
In Derby, the average sunshine in September is 6.7h.UV index
The average daily maximum UV index in September in Derby, United Kingdom, is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What are September temperatures in Derby?
What is the average humidity in September in Derby?
How much does it rain in Derby in September?
When it does not snow in Derby?
What is the average length of the day in September in Derby?
When are sunrise and sunset in September in Derby?
How many hours of sunshine does Derby have in September?
What is the UV index reading in September in Derby?
Average temperature in September
Derby, United Kingdom
- Average high temperature in September: 17.2°C
The warmest month (with the highest average high temperature) is July (20°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 9.7°C
The month with the highest average low temperature is August (11.9°C).
The coldest months (with the lowest average low temperature) are January and February (1.3°C).
Average pressure in September
Derby, United Kingdom
- Average pressure in September: 1016mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.6mbar).
Average wind speed in September
Derby, United Kingdom
- Average wind speed in September: 13.5km/h
The windiest months (with the highest average wind speed) are February and December (18.6km/h).
The calmest month (with the lowest average wind speed) is July (13km/h).
Average humidity in September
Derby, United Kingdom
- Average humidity in September: 83%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (80%).
Average rainfall in September
Derby, United Kingdom
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is June (45mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Derby, United Kingdom
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (10.7 days).
Average snowfall in September
Derby, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Derby, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Derby, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 6h and 4min
The months with the most sunshine are July and August (Average sunshine: 7h and 18min).
The month with the least sunshine is November (Average sunshine: 3h and 42min).
Average sunshine days in September
Derby, United Kingdom
- Average sunshine days in September: 15 days
The month with the most sunshine days is January (15.6 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
Derby, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Derby, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is November (Cloud cover 62).
The months with the least cloud cover are April and September (Cloud cover 53).
Average visibility in September
Derby, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August, October and December (9km).
The months with the lowest visibility are September and November (8km).
Derby, United Kingdom
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